This guide is designed to alert readers to the scope and variety of programming coming up. Listing is not meant to represent blanket endorsement. Viewers are urged to be selective. SATURDAY
My Friend Liberty (CBS, 7:30-8 p.m.): Clay-animated fantasy about a boy learning the true meaning of freedom from Lady Liberty herself.
A Star-Spangled Celebration (ABC, 8-11 p.m.): Hosts Oprah Winfrey and Robert Urich join celebrities from coast to coast to celebrate liberty with fireworks and performing talent.
A Boston Pops Fourth with John Williams and the Boston Pops (PBS, 8-9:30 p.m.): A live performance of ``Evening at Pops'' celebrating Independence Day.
Welcome Home Vietnam Veterans (HBO/pay cable, 9 p.m.-midnight): Taped coverage of a superstar concert tribute to heighten awareness of Vietnam vets' contributions to liberty.
A Capitol Fourth - 1987 (PBS, 9:30-11 p.m.): Flutist Jean-Pierre Rampal performs with the National Symphony Orchestra on the West Lawn of the US Capitol.
The Wind in the Willows (ABC, 7-9 p.m.): Animated musical adaptation of Kenneth Grahame's 1908 classic tale.
The Electric Valley (PBS, 10-11:30 p.m.): History of the Tennessee Valley Authority, America's largest producer of electrical energy, which was created during the Depression era.
Bates Motel (CBS, 9-11 p.m.): New sequel to the ``Psycho'' movies is a comedy-drama that spoofs psychological thrillers.
National Geographic Explorer (WTBS/cable, 9-11 p.m.): Short documentaries of interest to the whole family.
Isaac in America: A Journey with Isaac Bashevis Singer (PBS, 9-10 p.m.): ``American Masters'' segment blending fact with fiction in a story inspired by this Nobel laureate's own youthful struggle to become accepted as a writer.
The Human Face of the Pacific (PBS, 10:30-11 p.m.): First of four-part series focusing on the lifestyles of people on the Pacific Islands. Initial episode, ``Atoll in Kiribati,'' features one of the most isolated communities in the Pacific and how it has preserved its ancient customs.
Iran/Contra Hearings (CNN, PBS, NBC, ABC, from about 11 a.m. on): They plan full first-day coverage. CBS plans coverage only of ``significant'' testimony.
Inside the Persian Gulf (ABC, 10-11 p.m.): The second ``Jennings/Koppel Report'' will allow these two ABC newsmen to examine all aspects of Gulf politics.
Mostly Mozart Festival Gala (PBS, 8-10 p.m.): ``Live From Lincoln Center'' concert features Alicia de Larrocha, Marilyn Horne, Jean-Pierre Rampal, and Dawn Upshaw. Listings are in Eastern Time; other zones may vary. Please check listings for all PBS programs since local option often results in differing days and times.